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The students in three classes are in the ratio 2 : 3 : 5 respectively. If 80 students are increased in each class, the ratio becomes 3 : 4 : 6. What was the initial number of students in all three classes together?
  • a)
    800
  • b)
    840
  • c)
    900
  • d)
    960
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The students in three classes are in the ratio 2 : 3 : 5 respectively....
Let the number students in 2 classes = 2x, 3x and 5x

8x + 320 = 9x + 240
x = 80
So the answer = 2x + 3x + 5x = 10x = 10 × 80 = 800
Hence, Option A is correct.
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The students in three classes are in the ratio 2 : 3 : 5 respectively. If 80 students are increased in each class, the ratio becomes 3 : 4 : 6. What was the initial number of students in all three classes together?a)800b)840c)900d)960Correct answer is option 'A'. Can you explain this answer?
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